What equipment does not require waste connections in a plumbing system?

Eyewash stations are specifically designed to provide immediate decontamination for the eyes in case of exposure to hazardous materials. These stations do not require direct waste connections because they are generally equipped with a simple drainage feature that allows water to flow away without the need for a plumbing system designed for waste disposal. Instead, they often connect to a floor drain or may function with a tank system that collects the used water temporarily, which can be periodically emptied or disposed of in a safe manner.

In contrast, toilets, emergency showers, and drains are integral parts of a plumbing system that specifically require waste connections to ensure proper sanitation and drainage of wastewater. Toilets need robust connections to manage human waste effectively. Emergency showers must also allow for waste water to be quickly removed to prevent accumulation and contamination, while drains are fundamentally built to manage and transport waste water away from facilities. Thus, the unique design and function of eyewash stations enable them to operate without the need for these complex connections, distinguishing them from other fixtures in a plumbing system.